A source at Menchies Frozen Yogurt in Calabasas, where Justin and Selena visited Feb. 23, tells HollywoodLife.com exclusively, “Justin saw the tattoo inside my bottom lip and said he wanted to get one too. He thought it was pretty cool.”

Adds the insider, “He said he has wanted to get one there for a while now, but he didn’t say what kind.”

Even though Selena wasn’t with Justin when he visited Menchies, she was just down the street grabbing a coffee, while Justin and his bodyguard were satisfying their sweet tooth.

“Justin was super cool,” our source says. “He had the strawberry banana frozen yogurt and he was really nice. A really cool dude.”

Perhaps Justin, who’ll be turning 18 next week, will treat himself to a new tattoo as his birthday gift. We just hope he shows it to us — especially if it’s in his lip. Do you think he should get something dedicated to Selena? Sound off below!